Circulator.



F W. GUIBERT.

CIRCULATOR.

APPLICATION FILED AUG.23. 1913.

Patented May 11, 1915.

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THE NORRIS PETERS CG. FHDTC-LITHQ. WASHINGTON. D- C.

F W. GUIBERT.

CIRCULATOR.

APPLICATION FILED AUG.23. 1913.

Patented May 11, 1915.

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F W. G'UIBERT.

CIRCULATOR.

APPLICATION FILED AUG.23. 1913.

Patented May 11, 1915.

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IHVENTOR WITHESSEJB W I 9W F W. GUIBERT.

CIRCULATOR.

APPLICATION FILED Aue.23,191s.

1,138,864. Patented May 11, 1915.

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F WALTER GUIBERT, OF DETROIT, MICHIGAN, AS SIGNOB TO ECKLIFF AUTOMATIC BOILER CIRGULATOR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

CIRCULATOR.

Specification of Letters Patent.

Application filed August 23, 1913. Serial N 0. 786,255.

To all whom it may concern.

Be it known that I, F VVALTER GUIBERT, citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Circulators, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to circulators equalizing the heat in boilers by convection.

It is especially adapted for marineengine boilers but may be also used to attain advantageous results with other steam boilers.

The generic invention consists in: y (1) Placing the circulator pipe for a relatively long distance in contact with the outside surface of a wall inclosing a chamber in which combustion is going on or the products of combustion are contained. a (2) The arrangement of the discharge mouths of the circulator pipes so as to keep the water agitated above a large area of such surface to prevent foreign matter in the water depositing thereon to form a scale. It also eliminates a dead air and water filament above such surface to prevent the proper and equal distribution of heat by convection.

(3) The augmenting of the circulator surface in contact with heated surface cooperates with the placing of the mouths of the circulators to sweep given surfaces, for the flow is accelerated and the sweeping there-.

fore more efiiciently performed.

The specific arrangements by which I secure the heat to facilitate the flow and sweep of the circulating current will more fully appear hereinafter.

In the drawings: Figure 1 is a horizontalof the boiler. Fig. 4 is a vertical longitudinal section of the same boiler showing in side elevation the same circulator. Fig. 5 is a vertical cross section of aboiler the left half of which is taken on the line AA of Fig. 6 and the right half of which is taken on the line BB of Fig. 6. Fig. 6 is a vertical longitudinal view of a boiler showing a circulator that lies against the flue pipes and also a circulator that lies against the combustion chamber, looping thereacross, both on the sides and on top. Fig. 7 is a vertical cross section of a boiler in which the circulator pipes are arranged on each side of the combustion chamber. Fig. 8 is a vertical longitudinal section of the same.

Circulators have been passed through the furnace and through the combustion cham: ber in prior devices but when the fire plays directly on the circulator it gets such excessive heat that the matter in suspension in the column of water passing through the circulator will bake onto the inside wall of the circulator and eventually choke the passageway, becoming dangerous. This trouble may be avoided by laying the circuamount of surface in contact with the heat.

ed surface of the furnace. Circulators have been brought into proximity with the flues but not parallel with and contacting. It is also believed that a circulator pipe has never been laid against the tall and long surface of the combustion chamber to secure heat to operate the circulator.

The circulator works upon the plan of confining a column of water that is heated to a higher temperature than the enveloping water. The water expands slightly, becomes of less specific gravity, and rises. Other water flows in at the lower end to take the place of .the water that has issued from the top. The more surface that can be brought into contact with a heated surface to secure heat by conduction the quicker will the confined column fall in specific gravity and rise. The extended circulator length brought into contact with heated walls by looping and employing the circulator in contact with long stretches of fire-played surface, as on the combustion chamber, insures a quicker heating of the circulator column of water and hence a more rapid flow. The more rapid the flow the better the mixing of the water and the better the convey- Patented May 11, 1915. p

ance of all parts of the water to situations of greater heat imparting abilities, but beyond this the acceleration agitates the water and prevents the settling upon the heated surfaces of foreign substances found in the water. This precipitation is important to avoid as it becomes baked upon the surface and forms the objectionable scale that causes so much trouble. To this end I arrange the discharge of my accelerated water columns so that they will tend to agitate the water above the heated surfaces desired to be projected and so that they will also sweep such surfaces.

1 indicates the boiler shell, 2 the furnace shell and chamber, and 8 the combustion chamber. The fines 4. lead from the combustion chamber back to the front of the boiler. Stay-bolts 5 serve to connect the two heads of the boiler and strengthen the boiler structure. Hangers 6 and legs 7 help to support the combustion chamber in the boiler. The furnace chamber may be made in any suitable way. In Figs. 4, 6, and 8 it is shown constructed of cylindrical flanged sections. In Figs. 1 and 2 it is shown as corrugated. Man holes 8 and 9 are provided to give access to the interior of the boiler.

In Figs. 1 and 2, two circulators are shown looped across the sides of the furnace chamber and also looped upon the crown of the furnace. The crown of the furnace'is one of the hottest, if not the hottest surface, in the boiler. Hence it furnishes a goodly supply of heat to operate the circulatorespecially when the circulator is looped back and forth upon its surface. Especially important is the arrangement of the discharge mouths of the circulator pipes so that the discharge sweeps lengthwise in each direction on the crown, in other words, sweeping the entire area of the crown of the furnace and eliminating possibility of deposit with the resulting scale. This is a functional feature that has heretofore been neglected and as already explained the acceleration of the water column of the circulator by the increased heating surface contributes to the efiiciency of the sweeping function.

Figs. 3 and a show an economical circulator, as one circulator does the work for a boiler having two furnace chambers. The circulator is looped upon the adjacent sides of the two combustion chambers. The piping travels across the side of one combustion chamber and then crosses to the adber.

are arranged so that one sweeps above the collection of fines to keep the water thereabove' agitated and the other sweeps above the combustion chamber to keep such water agitated. Thus deposits are prevented and scale avoided.

In Figs. 7 and 8 two circulators are shown in connection with eachcombustion chamber, one circulator ascending on the inside and one on the outside of each combustion chamber.

The circulator pipes are of relatively thin metal, being only about one-sixteenth of an inch in thickness. The ordinary pipe will not accomplish results at all satisfactory. I find that by using metal of one-sixteenth inch thickness (which is as relatively thin as'will comport with the necessary strength) that much more heat is absorbed by the water column in the circulator and hence that a very much better circulation is set up.

What is claimed is:

1. In a boiler provided with a furnace and flue tubes for the products of combustion, a circulator comprising a pipe leading from the bottom of the boiler up to said fines and lying lengthwise of and against one or more of the lines.

2. In a boiler provided with a furnace and flue tubesfor the products of combustion, a circulator comprising a pipe leading from the bottom of the boiler up to the fines, looping up the sides of some of the fines by lying along and against some of the same, and looping back and forth on the top of some of the flues by lying along and against some of the same.

In testimony whereof, I sign this specification in the presence of two witnesses.

F WALTER GUIBERT.

WVitnesses:

DAISY C. Frrz GERALD, Aenns L. FRENCH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

